LTC3416
14
3416fa
APPLICATIO S I FOR ATIO
WUUU
Figure 7. LTC3416 Layout Diagram
(7a) Top Layer (7b) Bottom Layer
PC Board Layout Checklist
When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of the
LTC3416. Check the following in your layout.
1. A ground plane is recommended. If a ground plane layer
is not used, the signal and power grounds should be
segregated with all small-signal components returning
to the SGND pin at one point which is then connected to
the PGND pin close to the LTC3416.
2. Connect the (+) terminal of the input capacitor(s), C
IN
,
as close as possible to the PV
IN
pin. This capacitor
provides the AC current into the internal power MOSFETs.
3. Keep the switching node, SW, away from all sensitive
small-signal nodes.
4. Flood all unused areas on all layers with copper. Flood-
ing with copper will reduce the temperature rise of
power components. You can connect the copper areas
to any DC net (PV
IN
, SV
IN
, V
OUT
, PGND, SGND or any
other DC rail in your system).
5. Connect the V
FB
pin directly to the feedback resistors.
The resistor divider must be connected between V
OUT
and SGND.
3416 F07a
3416 F07b
